higginbottom



No. 619,483. Patented Feb I4 |899 .1. HIGGmoTToM. APPARATUSFDR HEATING AIR. (Application med'nec. ao. 1897.) (No Model.) 2 Sheets-Sheet l.

THE Nonms Piratas co.. PHocLLn'Ho.. wAsHmGToN. D.

IEESSES Patented Feb. I4, |899.

J.l HIGGINBTTM. APPARATUS FOR HEATING AIR.

(Application med nec. so, 1am-L 2 Sheets-Sheet 2.-

(No Model.)

ITEEEES sumo. wmm'cww. u. r.

rn Nunms PETERS co Hm UNITED STATES APPARATUS FOR HEATING AIR.

SPECIFICATION forming part of Letters Patent No. 619,483, dated February 14, 1899. Application filed December 30, 1897. Serial No. 664,705. (No model.)

To all whom t may concern.-

Be it known that I, JAMES HIGGINBOTTOM, a subject of the Queen of Great Britain, residing at Liverpool, in the county of Lancaster, England, have invented certain new and useful Improvements in Apparatus for Heating Air, (which invention has been patented to myself in England, No. 13,012, dated July 5, 1895,) of which the following is a specification.

This invention relates to that class of apparatus in which currents of air are heated by contact with the heated exteriors of metal pipes, such pipes being made hot by the circulation and condensation of steam in their interiors.

The object of my invention is to obtain a novel means of causing a circulation in the inf terior of the pipes and a simple means of removing the water of condensation.

The invention will be best understood by referring to the accompanying drawings, in which- Figure 1 is a longitudinal section, Fig. 2 a

plan, Fig. 3 an end View, partly in section, and Fig. 4 a cross-section, of my improved heater.

In the drawings, Ais a chamber or conduit for the steam, which enters at a, and B a chamber or conduit for the condensed water, which passes out at b.

C are outgoing heating-pipes communicating at their lower ends with the steam-conduit A, their upper ends being open or free for the passage of steam, and D are return heatingpipes surrounding the pipes C and communicating at their lower ends with the conduit B, their upper ends being closed, as shown. These pipes C and D are so arranged that a condensing-space is left between the outside of the inner pipe C and the inside of the outer pipe D, and the inner pipe reaches, preferably, near to the top of the inside of the outer pipe.

The chambers A and B communicate with each other by means of passages c, but the steam is prevented from passing from one chamber to the other by the condensed water which collects therein and acts as a trap.

.E is a shield which covers the opening b and is open at the bottom and extends downward, so as to dip inthe water which collects in the bottom of the chambers A and B, thereby causing the steam to be still further condensed before passingthrough the pipe b to the steam-trap F, Fig. 3.

Gr is the casing surrounding the pipes.

The end of chambers or conduits Aand B, which communicate with each other by trap connections c and at which the steam enters and the water Hows out, are depressed below the level of the main body of said conduits, so that all the water from both conduits drains back into that end, and thus, as the trap connections c connect both depressed portions, the condensed water can flow out by orifice b.

The inode of action of the apparatus is as follows: The steam, entering at a, passes along the conduit A and up the pipes C and thence down the outer pipe D or condensingspace. The water of condensation falls to the water conduit or chamber B and is discharged from thence by the well-known steam-trap apparatus. The air to be heated enters through an open side of the casing G. The drawings show two of the steam and water conduits with their pipes arranged side by side, so as to form an assemblage of pipes; but it will be obvious that more than two may be used or one only may be used, as each in itself is a complete apparatus.

In some cases I may cause hot water to pass into the inner pipe C and out through the outer pipes D after such water has been cooled by the air passing over the outer surface of the outer pipe D, and in some cases I may arrange the series of pipes with the passages A and B placed at the upper ends of the pipes instead of at the bottom of the pipes.

I declare that what I claim is- In a heating apparatus, the combination of two conduits having depressed end portions containing water and connected bya trap connection, the two conduits having respectively an inlet-opening for steam and an outlet-opening for water, both of said openings being located above the trap connection, a shield in one of said conduits, covering the water-outlet opening, and extending down into the water in the depressed portion of the conduit, said shield being open at the bottom, and outgoing and return heating-pipes communicating respectively with the said two conduits and also communicating with one another.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES HIGGINBOT'IOM.

Witnesses:

W. H. BEEsroN, J. McLAoHLAN.

IOO 

